Slay the Gods: Dark Zagi

From the Start, the Protagonist Transforms into a Black Ultraman

The System is loving and peaceful.

Please Recommend a Book Where Noah and Zagi Get Together! I Read One Before but Forgot the Title

Darn It, Darn It! Are There Really No More Great Stories with Two Male Leads, Godslaying, and a Charismatic Protagonist?

I'd like to read something like "Slay the Gods: I Have Forbidden Domains and Can Borrow Power from All Realms". There are so few books featuring Guan Zai... and he's usually just a minor character who barely does anything. Does anyone know of other Slay the Gods stories with Guan Zai as one of the two male leads? If not, that's fine too, as long as the writing is good!